<p>Horizontal rules should probably consist of all of the same characters
EG:</p>

<hr />

<p>Or</p>

<hr />

<p>Or</p>

<hr />

<p>But not any of:</p>

<p>--*</p>

<p>-*-</p>

<p>-**</p>

<p>*--</p>

<p><em>-</em></p>

<p>**-</p>

<p>**_</p>

<p><em>_</em></p>

<p>*__</p>

<p>_**</p>

<p><em>*</em></p>

<p>__-</p>

<p><em>-</em></p>

<p>_--</p>

<p>-__</p>

<p>-_-</p>

<p>--_</p>
